.wrap {
  margin: auto;
  width: 600px;
  text-align: center;
}
.wrap .topMenu button {
  margin-right: 10px;
  border: none;
  border-radius: 2px;
  background-color: #68ccdc;
  cursor: pointer;
}
.wrap .topMenu .active {
  background: #2f52d1;
}
.wrap .content table {
  margin: 20px auto;
  text-align: center;
  border-collapse: collapse;
  word-wrap: break-word;
  word-break: break-all;
}
.wrap .content table tr td {
  height: 20px;
  width: 20px;
  border: 1px solid #ccc;
  border-width: 3px 2px 1px 2px;
  background-color: #b0adad;
}
.wrap .content table tr .mine {
  background-image: url(../images/mine.png);
  background-size: cover;
}
.wrap .content table tr .flag {
  background-image: url(../images/flag.png);
  background-size: cover;
}
.wrap .content table tr .zero {
  background: #fff;
}
.wrap .content table tr .one {
  background: #fff;
  color: #4f8000;
}
.wrap .content table tr .two {
  background: #fff;
  color: orange;
}
.wrap .content table tr .three {
  background: #fff;
  color: yellow;
}
.wrap .content table tr .four {
  background: #fff;
  color: blue;
}
.wrap .content table tr .five {
  background: #fff;
  color: goldenrod;
}
.wrap .content table tr .six {
  background: #fff;
  color: #8ba70b;
}
.wrap .content table tr .seven {
  background: #fff;
  color: #36b0a8;
}
.wrap .content table tr .eight {
  background: #fff;
  color: #fa0b0b;
}
